#coding:utf-8

# 队列任务执行开启多线程

import time
try:
        from Queue import Queue
except:
        from queue import Queue
import threading

import requests
from lxml import etree


class DoubanSpider(object):
        def __init__(self):
            self.url_list = ["https://movie.douban.com/top250?start=" + str(page) for page in range(0, 226, 25)]
            self.headers = {"User-Agent" : "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko"}
            self.queue = Queue()

        def send_request(self, url):
            print("[INFO]: send requests {}".format(url))
            response = requests.get(url, headers=self.headers)
            time.sleep(1)
            return response

        def parse_page(self, response):
            html = response.content
            html_obj = etree.HTML(html)
            node_list = html_obj.xpath("//div[@class='info']")

            for node in node_list:
                title = node.xpath("./div[1]/a/span[1]/text()")[0]
                score = node.xpath(".//span[@class='rating_num']/text()")[0]
                self.queue.put(title + "\t" + score)

        def main(self):
            thread_list = []
            for url in self.url_list:
                thread = threading.Thread(target=self.send_request, args=[url])
                thread.start()
                thread_list.append(thread)

            # 让主线程阻塞，等待所有子线程执行结束，主线程再继续执行
            for thread in thread_list:
                thread.join()


if __name__ == "__main__":
    spider = DoubanSpider()
    start = time.time()
    spider.main()
    end = time.time()
    print("[INFO]: using time {}".format(end - start))

